CYP19A1 and Gynecomastia: c. Database: Cochrane CENTRAL Search Strategy:1. gynecomastia OR gynaecomastia OR gynecomasty OR gynaecomasty2. antiestrogen* OR antioestrogen* OR “anti-estrogen*” OR “anti-oestrogen*” OR (estrogen* NEAR/2 suppress*) OR (oestrogen* NEAR/2 suppress*) OR tamoxifen OR raloxifene OR clomifene OR clomiphene3. androgen* OR danazol OR testosterone OR androstanolone OR dihydrotestosterone4. “aromatase inhibitor*” OR letrozole OR anastrozole OR testolactone OR exemestane5. #2 OR #3 OR #46. pubert* OR adolescen*7. #1 AND #5 AND #6 in Trials