Aya S. Ahmed, et al. “Evaluate the Effect of Covid-19 on the Availability and Access to Medication: A Study Influenced the Adherence of Chronic Medications Among Patients in the Khartoum Locality”. Advanced Concepts in Pharmaceutical Research Vol. 2, Nov. 2023, pp. 49-62, doi:10.9734/bpi/acpr/v2/11123F.