Outcomes after helicopter versus ground emergency medical services for major trauma--propensity score and instrumental variable analyses: a retrospective nationwide cohort study
Crossref DOI link: https://0-doi-org.brum.beds.ac.uk/10.1186/s13049-016-0335-z
Published Online: 2016-11-29
Published Print: 2016-12
Update policy: https://0-doi-org.brum.beds.ac.uk/10.1007/springer_crossmark_policy
Tsuchiya, Asuka
Tsutsumi, Yusuke
Yasunaga, Hideo