(٢) انظر هذه التفصيلات وغيرها (بالإنجليزية) في: Evidence Based Medicine overview of the main steps for developing and grading guideline recommendations [Journal] /auth.P.Abrams S Khoury، A.Grant//Prog Urol. - Paris: Prog Urol، ٢٠٠٧. - ١٧: Vol. ٢٠٠٧. - pp. ٦٨١ - ٦٨٤. (٣) للمزيد، انظر (بالإنجليزية): Grading Strength of Recommendations and Quality of Evidence in Clinical Guidelines Report From an American College of Chest Physicians Task Force [Journal] /auth.American College of Chest Physicians Task Force//American College of Chest Physicians. - ٢٠٠٦. - ١: Vol. ١٢٩.