Bacterial contamination of healthcare workers’ mobile phones in Africa: a systematic review and meta-analysis oleh Demisu Zenbaba, Biniyam Sahiledengle, Girma Beressa, Fikreab Desta, Zinash Teferu, Fikadu Nugusu, Daniel Atlaw, Zerihun Shiferaw, Bereket Gezahegn, Ayele Mamo, Tesfaye Desalegn, Wogene Negash, Getahun Negash, Mohammedaman Mama, Eshetu Nigussie, Vijay Kumar Chattu