RT Journal Article SR Electronic T1 Collecting and exploiting data to understand a nation’s sexual health needs: Implications for the British National Surveys of Sexual Attitudes and Lifestyles (Natsal) JF Sexually Transmitted Infections JO Sex Transm Infect FD BMJ Publishing Group Ltd SP 159 OP 161 DO 10.1136/sextrans-2018-053571 VO 95 IS 3 A1 Catherine H Mercer A1 Soazig Clifton A1 Gillian Prior A1 Robert W Aldridge A1 Chris Bonell A1 Andrew J Copas A1 Nigel Field A1 Jo Gibbs A1 Wendy Macdowall A1 Kirstin R Mitchell A1 Clare Tanton A1 Nick Thomson A1 Magnus Unemo A1 Pam Sonnenberg YR 2019 UL http://sti.bmj.com/content/95/3/159.abstract AB