Anhedonia, depression, anxiety, and craving for opiates in opiate addicts stabilized on oral naltrexone and long acting naltrexone implant. (1st November 2015) - Krupitsky, Evgeny; Zvartau, Edwin; Blokhina, Elena; Verbitskaya, Elena; Palatkin, Vladimir; Tyurina, Arina; Yaroslavtseva, Tatyana; Bushara, Natalia; Pecoraro, Anna; Woody, George E.