McCausland R (1783)
- Maehle A-H (2011).
Four early clinical studies to assess the effects of Peruvian bark.
- Gachelin G, Garner P, Ferroni E, Tröhler U, Chalmers I (2016).
Evaluating Cinchona bark and quinine for treating and preventing malaria.
- Fair tests of treatments
- Individual patient data
- The play of chance
- Bringing it all together for the benefit of patients and the public