Implementation and formative evaluation of a peer-led chemsex intervention targeting sexualised crystal methamphetamine and GHB use: the M3THOD study. - Freestone, Jack; Storer, Daniel; Siefried, Krista J.; Bourne, Adam; Prestage, Garrett; Ezard, Nadine; Maher, Lisa; Stirling, Robert; Xiao, Bo Justin; Murphy, Dean; Degenhardt, Louisa; Hammoud, Mohamed (Harm Reduction Journal, 2025)