Donald E Greydanus1, Joav Merrick2. 1. MD, DrHC (Athens), Founding Chair and Professor, Department of Pediatric and Adolescent Medicine, Western Michigan University, Homer Stryker MD School of Medicine, 1000 Oakland Drive, Kalamazoo, MI 49008-1284, USA. 2. MD, MMedSci, DMSc, Professor of Pediatrics, Department of Pediatrics, Mt Scopus Campus, Hadassah Hebrew University Medical Center and Director, National Institute of Child Health and Human Development, Jerusalem, Israel.