Effect of nociception level-directed analgesic management on opioid usage in robot-assisted laparoscopic radical prostatectomy: a single-center, single-blinded, randomized controlled trial

Tanaka, N., Kadoya, Y., Suzuka, T., Yamanaka, T., Ida, M., Naito, Y.,Ozu, N., Hori, S., Kawaguchi, M.