APOL1 and human African trypanosomiasis: Two common APOL1 variants, G1 (rs73885319, p.S342G) and G2 (a 6-bp in-frame deletion removing two amino acids, rs71785313, p.N388_Y389del), extend APOL1 restriction to T.b.rhodesiense, the cause of acute human African trypanosomiasis.