In use, a test sample of blood is contacted with the matrix of said test device and the light reflectance therefrom is measured as an indication of the quantitative amount of {HEAD ~ hemoglobin} present in {TAIL ~ said sample} 
In use , a test sample of blood is contacted with the matrix of said test device and the light reflectance therefrom is measured as an indication of the quantitative amount of { HEAD ~ hemoglobin } present in { TAIL ~ said sample }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL