1. S = surgical cases included in row 12, Table 1.
2. M = medical cases included in row 13, Table 1.
3. Peptococcus septic arthritis after surgery in rheumatoid arthritis;M Aptekar;Clinical Orthopaedics and Related Reserach,1972
4. Suppurative pneumococcic arthritis;M Argen;New York State Journal of Medicine,1964
5. Suppurative arthritis;Argen;Archives of Internal Medicine,1966