Trend of Blood Cholesterol Level in Iran: Results of Four National Surveys During 1991-2008 - Hosseini, Mostafa; Yousefifard, Mahmoud; Taslimi, Shervin; Sohanaki, Hamid; Nourijelyani, Keramat; Asgari, Fereshteh; Etemad, Koorosh; Koohpayehzadeh, Jalil; Heidarian Miri, Hamid; Rafei, Ali; Gouya, Mohammad Mehdi; Mohammad, Kazem (Acta Medica Iranica)