Correspondence to Dr Morten Hoegh, Department of Health Science and Technology, Aalborg University, 9100 Aalborg, Denmark; msh{at}hst.aau.dk If you wish to reuse any ...
Correspondence to Karl Bang Christensen, Department of Public Health, Section of Biostatistics, University of Copenhagen Faculty of Health and Medical Sciences, Kobenhavn, Denmark; kach{at}sund.ku.dk ...
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