Meet the board

Maria Müller-Staub


Maria Müller-Staub is the President of ACENDIO. She is former Professor of ZHAW University in Winterthur, and is founder of Pflege PBS (Nurse Consulting, Teaching, & Research), Wil, Switzerland. She has led over 65 research projects on nursing diagnostics including a Nursing Process-Clinical Decision Support Standard (NP-CDSS). Her focus is on Standardized Nursing Languages (SNL), e-Health, nursing documentation, clinical decision-making and critical thinking. She consults healthcare institutions in implementing SNLs and in measuring the quality of the Advanced Nursing Process. Her instrument Quality of Diagnoses, Interventions and Outcomes (Q-DIO) was translated into eight languages and is used worldwide. Prof. Müller-Staub teaches in post-graduate nursing programs and supervises doctoral students. Formerly, she was Dean of a nursing school for advanced degree programs. From 2011-2017 she was President of the Swiss Association for Nursing Research. Maria Müller-Staub published over 310 scientific articles/chapters and has held over 200 conference presentations.

Claudia Leoni-Scheiber


Claudia Leoni-Scheiber is a registered nurse and intensive care specialist with 10 years of clinical experience. Claudia holds master’s degrees as nursing lecturer and in nursing science. During her PhD program she performed an experimental study to evaluate Guided Clinical Reasoning, an educational intervention to support nurses in using Standardized Nursing Languages (SNLs). She is a freelancing educator and consults healthcare institutions to use the Advanced Nursing Process, which bases on nursing classifications. She published books and articles on this topic, and on nurse-to-patient ratio and patient safety. Claudia is teaching Critical Thinking and implementing SNLs into practice and education in University and tertiary level courses to enhance care quality and documentation. Her research focuses on the accuracy of nursing diagnoses, intervention effectiveness and measuring nursing-sensitive patient outcomes in Electronic Health Records.


Fabio D’Agostino


Fabio D’Agostino is the secretary of ACENDIO. Currently, he is an Associate Professor in Nursing at the Saint Camillus International University of Health and Medical Sciences (UniCamillus), Rome, Italy. He has a background in Nursing and he has Bachelors, Masters and Doctoral degrees in Nursing and Nursing Science and Midwifery from the universities of Sapienza and Tor Vergata, Rome, Italy. He has more than 10 years experience in nursing research with a particular focus on the nursing minimum data set, electronic nursing documentation, standard nursing terminologies and self-care in heart failure. Fabio is a member of the NANDA-I Research Committee and a member of the Clinical Data Analytics workgroup of the University of Minnesota School of Nursing, USA. From 2016-2019 he was the secretary of the Italian Society of Nursing Science.

Helen de Graaf-Waar


Helen de Graaf-Waar, MSc, has a teaching position in a bachelor nursing program in Rotterdam, the Netherlands. Formerly, she was an oncology nurse and a clinical nurse specialist for palliative care and homecare technology in the Daniel den Hoed Cancer Center in Rotterdam. In palliative care, Standardized Nursing Languages (SNL) did hardly exist. Therefore, Helen developed clinical reasoning skills and experienced the value of nursing diagnoses. She is proud to be a nurse with many years of experience at the bedside before starting her work in education and research. In cooperation with the informatics department she developed an electronic nursing care plan including SNLs. Besides that, she is a board member in the Dutch Association VDIR, which is has a similar mission as ACENDIO. Helen supports health care organizations by education and implementation of SNLs into electronic health records.

Sergio Barrientos-Trigo

Board Member

Sergio Barrientos-Trigo is a Full Professor in Nursing Department at the University of Seville, Spain. He is a Registered Nurse and he has experience in Emergency Departments. He has two Master’s degrees, one in nursing research and other in gender studies, and a Doctoral degree in Nursing. His research is about developing a system for optimising patient to nurse ratio and its effects on health outcomes. Also, he is involving in nursing taxonomic development and psychometric validation of scales. Sergio was a member of the Board of AENTDE (Spain).

Bente Christensen

Board Member

Bente Christensen is working as Senior Adviser on eHealth at the Norwegian Nurses Organization, and as Associate Professor at the Faculty of Nursing and Health Sciences at the Nord University in Norway. She is a Registered Nurse, a Candidate in Nursing Science and holds a PhD in Information Systems Research. Her main working field is in nursing terminologies and in structuring Nursing Documentation in Electronic Patient Records.  Bente has been working as a clinical nurse mainly in the Orthopedic surgery ward at the University Hospital of North Norway, where she later had positions as Head Nurse and as Head of DEPARTMENT. She has also been working as Project Manager and Directors Adviser at the Norwegian Centre for e-Health Research and chaired the Special Interest Group in e-Health for nurses in the Norwegian Nurses Organization for 4 years.

Mikko Härkönen

Board member

Mikko Härkönen, RN,  M.Soc.Sc, is a development manager at the Finnish Institute for Health and Welfare. He has 15 years of experience as a nurse, and eight years in code systems, terminologies and classifications. Mikko holds a master’s degree in Health and Human Services Informatics from the University of Eastern Finland. His daily work focuses on social and healthcare interoperability, information architecture, and social and healthcare organizations. Mikko is a member of the Finnish Nursing Association, the Finnish Care Classification (FinCC) expert group, and the HIMSS Europe Nursing Informatics group. He is a chair in the SNOMED CT National Release Center of Finland, in the Member Forum of SNOMED International, and in several other Semantics, Informatics or ISO Networks. He is Member of the Finnish Social and Health Informatics Association, of the WONCA/WICC Classification Committee, and the ICPC-3 Consortium Task Force.

Valentina Zeffiro

Board Member

Valentina Zeffiro is a Post-Doctoral Research Fellow (2019) in University of Rome Tor Vergata, in the fields of Standardized Nursing Languages (SNLs), community nursing led units, and chronicity. She has a master’s degree in Nursing Science and Obstetrics (2015), and a Specialistic Nursing Degree in Community and Emergency Care (2014). She works as lecturer at the Saint Camillus International University of Health and Medical Sciences, Sapienza University of Rome, and Tor Vergata University. Valentina is an active member of the Italian Society of Nursing Science (SISI).  She was licensed as Relational Counselor (2019) and Life Coach (2019), her expertise includes communication and Neuro Linguistic Programming (2018).