Ma, Weiguo, Department of endocrinology, The First Affiliated Hospital of Xi'an Medical University, Xi'an 710077, China Marinho, Margarida, Escola Superior de Desporto e Lazer, Instituto Politécnico de Viana do Castelo, Rua Escola Industrial e Comercial de Nun’Alvares, 4900-347 Viana do Castelo, Portugal Martinez-Sánchez, Noelia, Oxford Centre for Diabetes, Endocrinology and Metabolism, University of Oxford Melo, José Filipe, Instituto de Anatomia Patológica, Faculdade de Medicina, Universidade de Lisboa Miah, Md. Rahimullah, Department of Health Information Technology, Northeast Medical Pvt. Limited, Sylhet, Bangladesh