Table 2.

Example of ACH classification

1	2	3	4	5	6	7	8	Example
X	X	X		X	X	X		1-3; 5-7
X		X	X	X	X			1; 3-6
	X	X	X			X	X	2-4; 7-8
X	X	X					X	1-3; 8