Ma, Rongshuang Ma, Yanru Mac-Marcjanek, Katarzyna Mac-Marcjanek, Katarzyna (Poland) Machaliński, Bogusław Machnica, Łukasz Machnik, Grzegorz Machura, Edyta, Chair and Department of Paediatrics, Zabrze, Medical University of Silesia, School of Medicine with the Division of Dentistry, Poland Machura, Edyta (Poland) Machura, Ewelina, Department of Nephrology, Transplantation and Internal Medicine, Medical University of Silesia, Katowice, Poland Maciaszczyk, Piotr Maciaszek, Julian Maciejewska-Paszek, Izabela, Department of Health Promotion and Community Nursing, Medical University of Silesia, Katowice, Poland Maciejewski, Adam Maciejewski, Adam, Department of Endocrinology, Metabolism and Internal Medicine Poznań University of Medical Sciences (Poland) Maciejewski, Adam Maciel, Joana Macioszek, Adam Maciulewski, Rafał Macke-Nauman, Alicja Mackiewicz, Mirosława Macut, Djuro Mączewska, Joanna Madan, Renu Magalhães, Tiago