Y37 - Military operations
Y37.7 - Military operations involving chemical weapons and other forms of unconventional warfare
Excludes 1:
-military operations involving incendiary devices Y36.3-,Y36.5-)
Y37.7X - Military operations involving chemical weapons and other forms of unconventional warfare
Y37.7X0 - Military operations involving chemical weapons and other forms of unconventional warfare, military personnel
Y37.7X1 - Military operations involving chemical weapons and other forms of unconventional warfare, civilian