... ELUCIDATING THE GENETIC BASIS OF SEVERE OBESITY: LEARNING FROM THE EXPERIMENTS OF NATURE DR LEE YUNG SENG MBBS, MMED (PAED MED), MRCP (UK), MRCPCH, FAMS A THESIS SUBMITTED FOR THE DEGREE OF ... supported the role of genes in the pathogenesis of human obesity However, obesity has a wide phenotypic variability, ranging from the mildly overweight to the morbidly obese, as well as the spectrum of ... account of our contribution to this field of obesity research, not only in the discovery of novel MC4R mutations causing monogenic human obesity, but also the role of genetic variants of POMC...