Effects of an educational intervention based on the multi-theory model on promoting the quality of life in postmenopausal women: a protocol - Morowatisharifabad, Mohammad; Yoshany, Nooshin; Bahri, Narges; Sharma, Manoj; Jambarsang, Sara; Karimiankakolaki, Zohreh (Menopause Review/Przegląd Menopauzalny, 2019)