External quality control of direct sputum smears from Sierra Leone, West Africa.
Sticht-Groh
V
V
Boillot
F
F
D006801:Humans; D007755:Laboratories, Hospital / Q000592:standards*; D011786:Quality Control; D012807:Sierra Leone; D013183:Sputum / Q000382:microbiology*; D014397:Tuberculosis, Pulmonary / Q000175:diagnosis*