Engelhart L, Nelson L, Lewis S, Mordin M, Demuro-Mercon C, Uddin S, McLeod L, Cole B, Farr J. Knee injury and osteoarthritis outcome score subscales for patients with articular cartilage lesions of the knee. Am J Sports Med. 2012 Oct 1;40(10):2264-72.
Hershey N, Cann CI, Rothman KJ. Reply: overcoming hurdles to epidemiologic research. E & HR. 1985 Mar;7(2):9. doi: 10.2307/3564146
Cann CI, Rothman KJ. IRBs and epidemiologic research: how inappropriate restrictions hamper studies. E & HR. 1984 Jul;6(4):5-7. doi: 10.2307/3564590