Study protocol for clinical trial of the FIT Families multicomponent obesity intervention for African American adolescents and their caregivers: Next step from the ORBIT initiative oleh Jennifer Powell, Samiran Ghosh, Sylvie Naar, Phillippe B Cunningham, James R Roberts, David M Ledgerwood, Jeff Randall, Brian E Lozano, Colleen A Halliday, Mohan Madisetti