Organochlorine insecticides:PrThr:Pt:Milk:Ord:Screen
organochlorine insecticides:prthr:pt:milk:ord:screen
Organochlorine insecticides:Presence or Threshold:To identify measures at a point in time:Milk:Ordinal:Screen
organochlorine insecticides:presence or threshold:to identify measures at a point in time:milk:ordinal:screen