Acknowledgments
The authors wish to thank L. Ngombi for taking the samples from the CPB,
B. Selekon, A. Sausy and R. Sinner for technical help.
This study was supported by the Department of Health and Human Service
(DHHS) of USA, by the Luxembourg Ministry of Foreign and European
Affairs and Luxembourg Institute of Health [grants MAE-IV and
MAE-V]. G.F. Komoyo was also supported by a PhD training fellowship
funded by the Luxembourg Ministry of Foreign and European Affairs.