Apnoea-hypopnoea-index comparing the 2007 and 2012 American Academy of Sleep Medicine criteria in chronic obstructive pulmonary disease/obstructive sleep apnoea overlap syndrome

Baiting He, Miral Al-Sherif, Yingxin Wu, Sean Higgins, Esther Irene Schwarz, Yuanming Luo, Azza Farag Said, Nezar Refat, Nashwa Hassan Abdel Wahab, Joerg Steier