The use of specialised preterm birth clinics for women at high risk of spontaneous preterm birth: a systematic review

Table 1 Grouping of studies when more than one study reports on an individual clinic

Main study	Additional studies on the same clinic	Name and location of preterm birth clinic
Bolt 2011	Khambay 2012 Duhig 2009 Min 2016 Smout 2010^a	Guys and St Thomas’ Hospital, London, United Kingdom
Ivandic 2018	Alfirevic 2013 Care AG 2014 Care A 2014^a	Liverpool Women’s Hospital, Liverpool, United Kingdom
Karkhanis 2012^a	Raouf 2009^a	Birmingham Heartlands Hospital, Birmingham, United Kingdom

ISSN: 1471-2393