Rule of Nines  - percentage of skin burned
==========================================

11⋅9% + 1% = 100%

Count a Nine for each of:

	case ALL PATIENTS:
		left arm
		right arm
		anterior trunk
		anterior trunk
		posterior trunk
		posterior trunk
		/* This leaves 45%+1% to go around */

	case ADULT:
		left leg
		left leg
		right leg
		right leg
		head

	case CHILD:
		/* FALLTHROUGH */

	case INFANT:
		head
		head
		both legs
		both legs
		both legs

Alternative:

- "case ALL PATIENTS" as above; this distributes 54%

- Each half-leg is {7,8,9}% for {infant,child,adult} respectively

- Head (all around) gets whatever remains ({18,14,9}% respectively)