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[Pheochromocytoma in black Africa. Report of 9 cases].
N'Guessan HA, Keli E, Casanelli JM, Yapo P, Yakpa P, Kadio-Richard M, Koffi K, N'Dri D, Cornet L. N'Guessan HA, et al. Among authors: yakpa p. Chirurgie. 1990;116(3):315-9. Chirurgie. 1990. PMID: 2279450 Review. French.
[Ileo-sigmoid knot. 16 cases].
N'Guessan HA, Keli E, Yapo P, Casanelli JM, Kossoko H, Yakpa PE, Cornet L. N'Guessan HA, et al. Among authors: yakpa pe. Chirurgie. 1992;118(6-7):382-8. Chirurgie. 1992. PMID: 1342652 French.