Guest Editor: Lao-Tzu Allan-Blitz(Department of Medicine, Brigham and Women's Hospital, Boston, MA, USA; Department of Medicine, Boston Children's Hospital, Boston, MA, USA)

Guest Editors: Mellissa Withers (Keck School of Medicine of University of Southern California, USA) and Judith McCool (University of Auckland, New Zealand)

Guest Editor: Daniele Giansanti (Technology and Health Department, National Institute of Health, Rome, Italy)

Guest Editors: Nazik Elmalaika Obaid Seid Ahmed Husain (Professor of Pathology and Director of Medical Education Development Center, Faculty of Medicine & Health Sciences, Omdurman Islamic University, Khartoum, Sudan), Mohamed Elhassan Abdalla (Department of Medical Education, College of Medicine, Sharjah university, United Arab Emirates) and Mohammad Hassan Taha (Department of Medical Education, College of Medicine, Sharjah university, United Arab Emirates)

Gamal Shiha (GI and liver Unit, Specialized Medical Hospital, Faculty of Medicine, Mansoura University, Dakahlia, Egypt)