van Meerbeeck 2007.

Methods	Randomised controlled trial (1994‐2002)
Participants	Patients had histologic or cytologic proven stage IIIA N2 disease.
Interventions	Intervention:Three cycles of platinum‐based induction chemotherapy followed by surgery Control group: Three cycles of platinum‐based induction chemotherapy followed by definitive radiotherapy
Outcomes	Five‐year overall survival, progression‐free survival, toxicity and mortality
Notes	C factor for staging C3
Risk of bias
Bias	Authors' judgement	Support for judgement
Adequate sequence generation?	Low risk	Computer generated
Allocation concealment?	Low risk	Central allocation (European Organisation and Treatment of Cancer Data Centre)
Blinding? All outcomes	Unclear risk	None described
Incomplete outcome data addressed? All outcomes	Low risk	There were no losses to follow up for the outcome of overall survival in those patients who were randomly assigned.