Figure 1.

Preparation of indocyanine green. ICG was mixed with 10 mL of sterile water, and 3–5 mL was administrated intravenously. The injection can be repeated until a maximum dose of 5 mg/kg/day is reached. This figure was kindly provided by courtesy of Professor Yoon Woo Koh, Department of Otolaryngology-Head and Neck Surgery of Yonsei University, Korea. ICG, indocyanine green.