Transgender Men and Transmasculine One-on-One and Group-Delivered Empowerment for Targeted HIV Reduction (TOGETHR) Study: Protocol for a Digital Factorial Randomized Controlled Trial. - Reisner SL; Scheim AI; Cole SW; Wirtz AL; Poteat T; Mimiaga MJ; Marzinke MA; Meyer AI; Smith K; Pletta DR; Mayer KH (JMIR research protocols, 2025)