Competing interests
Johnson and Johnson)
AH has consulted, advised and/or performed industry-sponsored research for Philipps, GE, Sonosite, Konica Minolta, Codman & Shurtleff, Inc (Johnson and Johnson), Cadence, Insitu Biologics, Heron Therapeutics, Pacira, Baxter and BBraun Medical. Dr. Hadzic receives royalty income from BBraun Medical. He owns and directs NYSORA, the New York School of Regional Anesthesia. The other authors declare that they have no competing interests.