The method 2, wherein {HEAD ~ said substance} is selected from {TAIL ~ the group} consisting of: urea, creatinine, vitamin B12, beta two microglobuline and glucose 
is selected from
The method 2 , wherein { HEAD ~ said substance } is selected from { TAIL ~ the group } consisting of : urea , creatinine , vitamin B12 , beta two microglobuline and glucose
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH