Medication Adherence and Its Associated Factors among Patients with Type 2 Diabetes Mellitus Attending Primary Health Centers of Eastern Province, Saudi Arabia oleh Aseel Awad Alsaidan, Sultan Fahad Alotaibi, Ashokkumar Thirunavukkarasu, Bashayer Farhan ALruwaili, Rami Hamdan Alharbi, Maha M. Arnous, Omar Awad Alsaidan, Abdulbaqi Sulaiman Alduraywish, Yasir Abdulrahman Alwushayh