Similarities and differences in morphology, CD31 and CD68 expression of male vs. female sinoatrial node and its surrounding atrial muscle in ageing and obesity oleh Weixuan Chen, Jingmo Qu, Daniel Rams, Maciej Zajac, Raghad Albalawi, Abimbola Aminu, Malgorzata Mazur, Mateusz K. Holda, Jerzy Walocha, Krzysztof Gil, Marcin Kuniewicz, Halina Dobrzynski, Andrew Atkinson