Comparing the Effects of Aerobic and Stretching Exercises on the Intensity of Primary Dysmenorrhea in the Students of Universities of Bushehr - Vaziri, Farideh; Hoseini, Azam; Kamali, Farahnaz; Abdali, Khadijeh; Hadianfard, Mohamadjavad; Sayadi, Mehrab (Journal of Family and Reproductive Health, 2015)