Sixth version of the Addiction Severity Index: Assessing sensitivity to therapeutic change and retention predictors oleh María José Casares-López, Eva Díaz-Mesa, Paz García-Portilla, Pilar Sáiz, María Teresa Bobes-Bascarán, Eduardo Fonseca-Pedrero, Eduardo Carreño, Pedro Marina, María Teresa Bascarán, John Cacciola, Arthur Alterman, Julio Bobes