1. Kramer MS. Determinants of low birth weight: methodological assessment and meta-analysis. Bull World Health Organ. 1987;65(5):663–737.
2. Marufu TC, Ahankari A, Coleman T, Lewis S. Maternal smoking and the risk of still birth: systematic review and meta-analysis. BMC Public Health. 2015;15:239.
3. Flenady V, Koopmans L, Middleton P, Froen JF, Smith GC, Gibbons K, et al. Major risk factors for stillbirth in high-income countries: a systematic review and meta-analysis. Lancet. 2011;377(9774):1331–40.
4. Health and Social Care Information Centre. Statistics on womens smoking status at time of delivery, England, quarter 4, 2011–12 London: Department of Health; 2012 [updated May 24th 2012]. Available from:
https://digital.nhs.uk/data-andinformation/publications/statistical/statistics-on-women-s-smokingstatus-at-time-of-delivery-england/statistics-on-women-s-smokingstatus-at-time-of-delivery-englandquarter-4-2012-13
. Accessed 1 May 2019.
5. Bell R, Glinianaia SV, van der Waal Z, Close A, Moloney E, Jones S, et al. Evaluation of a complex healthcare intervention to increase smoking cessation in pregnant women: interrupted time series analysis with economic evaluation. Tob Control. 2018;27(1):90–8.