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Diagram of patient selection. IC/BPS, interstitial cystitis/bladder pain syndrome; TUR-C, transurethral resection and cauterization; group 1, TUR-C only; group 2, TUR-C and instillation; VAS, visual analogue scale; PUF, pelvic pain and urgency/frequency; IC-Q, Interstitial Cystitis-Questionnaire.
