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APA Citation
Frickmann, H., Schwarz, N. G., Girmann, M., Hagen, R. M., Poppert, S., Crusius, S., Podbielski, A., Heriniaina, J. N., Razafindrabe, T., Rakotondrainiarivelo, J. P., May, J., & Rakotozandrindrainy, R. (n.d.). serological survey of HIV and syphilis in pregnant women in Madagascar. Tropical medicine & international health, 18(1), 35–39. http://access.bl.uk/ark:/81055/vdc_100024471931.0x000063