[1] Swiss Fed Inst Technol Lausanne EPFL, Signal Proc Lab LTS5, EPFL STI IEL LTS5,Stn 11, CH-1015 Lausanne, Switzerland
[2] Swiss Fed Inst Technol Lausanne EPFL, EssentialTech Ctr, Lausanne, Switzerland
[3] Univ Dschang, Fac Med & Pharmaceut Sci, Dept Obstet & Gynaecol, Dschang, Cameroon
[4] Univ Geneva, Inst Global Hlth, Fac Med, Geneva, Switzerland
[5] Annex Reg Hosp Dschang, Dept Obstet & Gynecol, Dschang, Cameroon
[6] Univ Geneva, Fac Med, Dept Paediat Gynaecol & Obstet, Geneva, Switzerland
[7] Catholic Univ Appl Sci KSH, Fac Social Sci, Munich, Germany