BibTex format
@article{kalliala:2017:10.1136/bmj.j4511,
author = {kalliala, I and Markozannes, G and Gunter, M and Paraskevaidis, E and Gabra, H and Mitra, A and terzidou, V and Martin-Hirsch, P and Tsilidis, K and Kyrgiou, M},
doi = {10.1136/bmj.j4511},
journal = {British Medical Journal},
title = {Obesity and gynaecological and obstetrical conditions: an umbrella review of the literature},
url = {http://dx.doi.org/10.1136/bmj.j4511},
volume = {7},
year = {2017}
}