Mathematical coupling: a multilevel approach.
Gilthorpe
Mark S
MS
Biostatistics Unit, Centre for Epidemiology and Biostatistics, Leeds Institute of Genetics, Health & Therapeutics, University of Leeds, Leeds LS2 9LN, UK. m.s.gilthorpe@leeds.ac.uk
Tu
Yu-Kang
YK
D015982:Bias; D015340:Epidemiologic Research Design; D006801:Humans; D008433:Mathematics