1. National Center of Blood Transfusion, Brazzaville, Republic of Congo, Faculty of Sciences and Technology, Marien NGOUABI University, Brazzaville, Republic of Congo
2. National Center of Blood Transfusion, Brazzaville, Republic of Congo, Faculty of Health Sciences, Marien NGOUABI University, Brazzaville, Republic of Congo
3. National Center of Blood Transfusion, Brazzaville, Republic of Congo