| Level I | Good quality evidence |
Systematic review of RCTs with consistent findings High quality individual RCT |
| Level II |
Limited quality patient orientated evidence |
Systematic review of lower quality studies or studies with inconsistent findings Low quality clinical trial Cohort studies Case-control studies |
| Level III | Other |
Consensus guidelines, extrapolations from bench research, usual practice, opinion, disease-oriented evidence (intermediate or physiologic outcomes only), or case series |
[20] Tetanus vaccination (human bites): Muguti GI, Dixon MS. Tetanus following human bite. Br J Plast Surg. 1992 Nov-Dec;45(8):614-5. https://www.ncbi.nlm.nih.gov/pubmed/1493537
Tetanus vaccination (human bites): Patil PD, Panchabhai TS, Galwankar SC. Managing human bites. J Emerg Trauma Shock. 2009 Sep;2(3):186-90. https://www.ncbi.nlm.nih.gov/pubmed/20009309