Table 4.

Studies included in the systematic review, including the number of patients and evidence level

Study	Type of study	Level of evidence*
Alsalleeh et al., 2014[40]	CR	V
Bocanegra-Pérez et al., 2009[27]	CS	IV
Chiu et al., 2013[35]	CR	V
Chiu et al., 2014[39]	ROS	III
Di Fede et al., 2013[38]	ROS	III
Di Fede et al., 2016[43]	CS	IV
Favia et al., 2017[44]	CR	V
Friedrich and Blake, 2007[25]	CS	IV
Fujieda et al., 2020[50]	ROS	III
Furukawa et al., 2018[46]	CR	V
Furuya et al., 2017[45]	ROS	III
Junquera et al., 2009a[28]	CS	IV
Junquera et al., 2009b[29]	CR	V
Katz and Ordoveza, 2014[41]	CS	IV
Khamaisi et al., 2007[24]	ROS	III
Liao et al., 2019[48]	ROS	III
Longato et al., 2013[36]	CR	V
Mathai et al., 2018[47]	CS	IV
Mehanna and Goddard, 2010[31]	CR	V
Molcho et al., 2013[37]	ROS	III
Nomura et al., 2013[34]	CS	IV
O’Ryan and Lo, 2012[32]	ROS	III
Park et al., 2010[30]	CS	IV
Park et al., 2012[33]	ROS	III
Preidl et al., 2014[42]	CR	V
Song et al., 2008[26]	CR	V
Steybe et al., 2019[49]	CR	V

*Levels of Evidence for Prognostic Studies Adapted from the American Society of Plastic Surgeons. Available from: https://www.plasticsurgery. org/documents/medical-professionals/health-policy/evidence-practice/ ASPS-Rating-Scale-March-2011.pdf. [Last accessed on 2020 May 10]. CS=Case series; CR=Case report; ROS=Retrospective observational study