Consumption of proton pump inhibitors in outpatients of Gastroenterology Clinics in Khyber Pakhtunkhwa: evidence of inexpedient use - Muhammad Ashfaq; Syed Mobasher Ali Abid; Qasim Khan; Muhammad Junaid Hassan Sharif; Muhammad Zeeshan Haroon; Adil Naseer Khan; Yasser MSA Alkahraman (Gastroenterology Review)