%0 Journal Article %T A systematic review and meta-analysis of preanalytical factors and methodological differences influencing the measurement of circulating vascular endothelial growth factor %A Sjöbom, Ulrika %A Nilsson, Anders K. %A Gyllensten, Hanna %A Hellström, Ann %A Löfqvist, Chatarina %J PLoS ONE %V 17 %N 7 %D 2022-07-06 %I Public Library of Science %~ DeepDyve