Study	Reason for exclusion
Bar-AM 2000	Not an RCT, “the findings of the study group were compared with those of the last 161 consecutive patients who underwent LEETZ alone (the control group)”
Boardman 2004	Trial does not report outcome measures as specified in protocol
Ferenczy 1985	Quasi-RCT
Gentile 2001	Review article
Girardi 1994	Quasi-RCT
Gunasekera 1990	Quasi-RCT
Lisowski 1999	Not an RCT, “the choice between LLETZ or laser CO2 was made based on a pre-treatment examination (cytology, colposcopy, microbiology test and punch biopsy)”
O’Shea 1986	Quasi-RCT
Panoskaltsis 2004b	Commentary on an earlier published RCT
Singh 1988	Quasi-RCT