Table 1. Specific characteristics (breed, sex, age and creatinine kinase activity) of AM affected horses.

AM Horse	Breed	Sex	Age	CK1 [U/L]
1	Arabian horse	Stallion	1	655,022
2	Arabian horse	Mare	1	925,365
3	heavy WB	Mare	1.5	> 2,036*
4	heavy WB	Mare	1.5	> 2,036*
5	Arabian horse	Stallion	1	266,616
6	Cold-blooded horse	Stallion	2	98,795
7	WB	Stallion	2	> 2,036*
8	WB	Stallion	2	96,135
9	Pony	Gelding	1.5	73,500
10	Welsh Pony	Mare	1.5	1,682,500
11	heavy WB	Mare	1.5	681,000
12	WB	Mare	1	> 100,000*
13	WB	Stallion	1	> 20,000*
14	WB	Mare	1	382,477

AM, atypical myopathy

¹ creatine kinase in serum samples

*not finally determined with serial dilution