Professor J Patrick Vaughan has had an extensive career in international health and in health systems planning, evaluation and research, mainly in low and middle income countries. He has worked with the World Health Organisation in Geneva, the World Bank in Washington, and as consultant in public health to the UK National Health Service (NHS) in London. He has lived in Papua New Guinea where he worked in government health services, in Tanzania where he helped start the new medical school in Dar es Salaam, and in Bangladesh as research director in public health at the ICDDRB (International Centre for Diarrhoeal Disease Research), Dhaka. He has published many scientific papers and 10 books. He graduated in medicine from Guy's Hospital Medical School, London. Professor Cesar Victora leads the International Center for Equity in Health. Since obtaining his PhD at the University of London in 1983 and he has conducted research in maternal and child health and nutrition, birth cohort studies, inequalities in health, and on the evaluation of major health programs in many countries. He was President of the International Epidemiological Association (2011-14), and won the Canada Gairdner Global Health Award in 2017. He is a highly-cited researcher according to the Web of Science 2018, 2019 and 2020. Professor Mushtaque Chowdhury was the founding Dean of the James P Grant BRAC School of Public Health in Dhaka, Bangladesh, and formerly Executive Director and Vice Chair of BRAC, the world's largest NGO. He was a MacArthur Fellow at Harvard University and spent four years as Senior Adviser to the Rockefeller Foundation, based out of Bangkok, Thailand. He has published nearly 200 articles in national and international peer reviewed journals, including a recent article in Oxford Research Encyclopedia. In 2017 he received the Medical Excellence Award from the Ronald McDonald House Charities of the USA. He is the immediate past President of the Asia-Pacific Action Alliance on Human Resources for Health (AAAH).