Prevalence and predictors of polypharmacy and comorbidities among patients with chronic obstructive pulmonary disease: a cross-sectional retrospective study in a tertiary hospital... oleh Hassan Alwafi, Abdallah Y. Naser, Deema S. Ashoor, Alaa Alsharif, Abdulelah M. Aldhahir, Saeed M. Alghamdi, Abdallah A. Alqarni, Nada Alsaleh, Jamil A. Samkari, Safaa M. Alsanosi, Jaber S. Alqahtani, Mohammad Saleh Dairi, Waleed Hafiz, Mohammed Tashkandi, Abdullah Ashoor, Omaima Ibrahim Badr