Arosalo, B.M., Raekallio, M., Rajamäki, M., Holopainen, E., Kastevaara, T., Salonen, H., Sankari, S. Detecting early kidney damage in horses with colic by measuring matrix metalloproteinase -9 and -2, other enzymes, urinary glucose and total proteins. Acta Vet Scand. 2007 Jan 23;49(1):4 [24]. Here, MMP9 is linked to Nephropathy.