Coach-Assisted eHealth With Group or Individual Support for Employees With Obesity: Randomized Controlled Trial on Weight, Body Composition, and Health Metrics - Siniriikka A Männistö; Kirsi H Pietiläinen; Joona Muotka; Laura-Unnukka Suojanen; Raimo Lappalainen; Riitta Korpela (Journal of Medical Internet Research)