Protocol for a qualitative mechanistic study of MDMA with a sample of psychoanalytic psychotherapists: A phenomenological investigation. - Liberati, Elisa; Curran, H. Valerie; Fonagy, Peter; Clements, Henry; Lemma, Alessandra; McAlpine, Rosalind; Nutt, David J.; Schlag, Anne Katrin; Kamboj, Sunjeev K. (PLoS ONE, 2026)