Why has the dihydrofolate reductase 164 mutation not consistently been found in Africa yet?

Autor: Nzila, Alexis *, Ochong, Edwin, Nduati, Eunice, Gilbert, Kokwaro, Winstanley, Peter, Ward, Steve, Marsh, Kevin
Zdroj: In Transactions of the Royal Society of Tropical Medicine and Hygiene 2005 99(5):341-346
Databáze: ScienceDirect