Does smoking pot cause 'man boobs'?

... Since 2006, it has been among the top five cosmetic surgical procedures for men. Emily Pollard, head of plastic surgery for Lankenau Medical Center, now performs one gynecomastia surgery a month, twice as many as the year before. The increase, she ...

http://www.philly.com/philly/health/menshealth/20131124_Male_breast_growth_and_pot.html