Results of a multicenter trial "Epidemiology of Gastroesophageal Reflux Disease in Russia" (MEGRE) oleh Leonid Borisovich Lazebnik, Antonina Aleksandrovna Masharova, Dmitriy Stanislavovich Bordin, Yuriy Vasil'evich Vasil'ev, Evgeniy Ivanovich Tkachenko, Rustem Abbasovich Abdulkhakov, Mikhail Aleksandrovich Butov, Elena Yur'evna Eremina, Lyudmila Ivanovna Zinchuk, Vladislav Vladimirovich Tsukanov, L B Lazebnik, A A Masharova, D S Bordin, Yu V Vasiliev, E I Tkachenko, R A Abdulkhakov, M A Butov, E Yu Eremina, L I Zinchuk, V V Tsukanov