| 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 |
[8] Polyvalent antivenom (cytotoxic Mozabique spitting cobra bite): World Health Organisation: Guidelines for the prevention and clinical management of snakebite in Africa. https://www.who.int/health-topics/snakebite#tab=overview