Re: Association between preconception paternal smoking and birth defects in offspring: evidence from the database of the National Free Preconception Health Examination Project in China

Abstract

The authors of the original article were invited to reply but did not feel that a response was necessary.

Authors' reply re: Association between preconception paternal smoking and birth defects in offspring: evidence from the database of the National Free Preconception Health Examination Project in China

“…We would like to thank Wu and colleagues for their interesting comments 1 . The authors point out the key role of confounding factors such as paternal age for future interpretation when analysing the effect of paternal smoking on the risk of birth defects in offspring 2 …”