Grayson M.
Hospitals. 1992 May 20;66(10):8.
PMID: 1577454

Gupta A, Gray CS, Landes M, Sridharan S, Bhattacharyya O.
Can Fam Physician. 2021 Sep;67(9):647-651. doi: 10.46747/cfp.6709647.
PMID: 34521704

Page C, Sloane PD.
Fam Med. 2020 Jun;52(6):414-416. doi: 10.22454/FamMed.2020.969649.
PMID: 32520374

Praszek K, Taylor A, Chappelle K.
JAMA. 1998 May 06;279(17):1403.
PMID: 9582056

Qidwai W.
Eur J Gen Pract. 2004 Sep;10(3):111. doi: 10.3109/13814780409044549.
PMID: 15534580

Sadovsky R, Plotz CM.
J Med Educ. 1979 Nov;54(11):895-7. doi: 10.1097/00001888-197911000-00010.
PMID: 501720

Geyman JP.
J Fam Pract. 1978 Aug;7(2):257-60.
PMID: 681893