Article Protocol for a quasi-experimental study of the effectiveness and cost-effectiveness of mother and baby units compared with general psychiatric inpatient wards and crisis resolution team services (The ESMI study) in the provision of care for women in the postpartum period Trevillion, Kylee, Shallcross, Rebekah, Ryan, Elizabeth, Heslin, Margaret, Pickles, Andrew, Byford, Sarah, Jones, Ian, Johnson, Sonia, Pawlby, Susan, Stanley, Nicky, Rose, Diana, Seneviratne, Gertrude, Wieck, Angelika, Jennings, Stacey, Potts, Laura, Abel, Kathryn M and Howard, Louise M Available at http://clok.uclan.ac.uk/28138/ Trevillion, Kylee, Shallcross, Rebekah, Ryan, Elizabeth, Heslin, Margaret, Pickles, Andrew, Byford, Sarah, Jones, Ian, Johnson, Sonia, Pawlby, Susan et al (2019) Protocol for a quasi- experimental study of the effectiveness and cost-effectiveness of mother and baby units compared with general psychiatric inpatient wards and crisis resolution team services (The ESMI study) in the provision of care for women in the postpartum period. BMJ Open, 9 (3). e025906. It is advisable to refer to the publisher’s version if you intend to cite from the work. http://dx.doi.org/10.1136/bmjopen-2018-025906 For more information about UCLan’s research in this area go to http://www.uclan.ac.uk/researchgroups/ and search for <name of research Group>. For information about Research generally at UCLan please go to http://www.uclan.ac.uk/research/ All outputs in CLoK are protected by Intellectual Property Rights law, including CLoK Central Lancashire online Knowledge www.clok.uclan.ac.uk