American Society for Enhanced Recovery (ASER) and Perioperative Quality Initiative (POQI) joint consensus statement on optimal analgesia within an enhanced recovery pathway for colorectal surgery: part 1--from the preoperative period to PACU. - McEvoy, Matthew D.; Scott, Michael J.; Gordon, Debra B.; Grant, Stuart A.; Thacker, Julie K. M.; Wu, Christopher L.; Gan, Tong J.; Mythen, Monty G.; Shaw, Andrew D.; Miller, Timothy E. (Perioperative Medicine, 2017)