Ojukwu O., Patel D., Stephenson J., Howden B., and Shawe J. “General practitioners’ Knowledge, Attitudes and Views of Providing Preconception Care: A Qualitative Investigation”. Upsala Journal of Medical Sciences, vol. 121, no. 4, Sept. 2016, pp. 256–263, doi:10.1080/03009734.2016.1215853.