A red light for blue light.
Ray
Eleanor R
ER
Department of Urology, Guy's Hospital, London, UK. Eleanor.ray@gstt.nhs.uk
O'Brien
Tim S
TS
D002986:Clinical Trials as Topic / Q000379:methods*; D005062:European Union; D006291:Health Policy; D006801:Humans; D017410:Practice Guidelines as Topic; D006113:United Kingdom