title: Authors' reply to the letter to the editor by Wills et al.
authors.affiliation: Graduate Institute of Epidemiology and Preventive Medicine, National Taiwan University, Taipei, Taiwan, School of Social and Community Medicine, University of Bristol, Bristol, UK and Division of Epidemiology and Biostatistics, School of Medicine, University of Leeds, Leeds, UK yukangtu@ntu.edu.tw.
authors.forename: Yu-Kang
authors.initials: YK
authors.lastname: Tu
authors.affiliation: Graduate Institute of Epidemiology and Preventive Medicine, National Taiwan University, Taipei, Taiwan, School of Social and Community Medicine, University of Bristol, Bristol, UK and Division of Epidemiology and Biostatistics, School of Medicine, University of Leeds, Leeds, UK.
authors.forename: Kate
authors.initials: K
authors.lastname: Tilling
authors.affiliation: Graduate Institute of Epidemiology and Preventive Medicine, National Taiwan University, Taipei, Taiwan, School of Social and Community Medicine, University of Bristol, Bristol, UK and Division of Epidemiology and Biostatistics, School of Medicine, University of Leeds, Leeds, UK.
authors.forename: Jonathan A C
authors.initials: JA
authors.lastname: Sterne
authors.affiliation: Graduate Institute of Epidemiology and Preventive Medicine, National Taiwan University, Taipei, Taiwan, School of Social and Community Medicine, University of Bristol, Bristol, UK and Division of Epidemiology and Biostatistics, School of Medicine, University of Leeds, Leeds, UK.
authors.forename: Mark S
authors.initials: MS
authors.lastname: Gilthorpe
mesh_terms: D001724:Birth Weight / Q000502:physiology*; D001794:Blood Pressure / Q000502:physiology*; D001835:Body Weight / Q000502:physiology*; D002657:Child Development / Q000502:physiology*; D005260:Female; D047109:Fetal Development / Q000502:physiology*; D006801:Humans; D008297:Male; D011247:Pregnancy; D013223:Statistics as Topic