Blood samples collected from the children also indicated a significantly high level of certain enzymes that collectively with other parameters or individually result in cellular damage in the body or the presence of a disease process affecting
the liver. High levels of creatinine (breakdown product of creatine phosphate in muscle usually produced at a fairly constant rate by the body depending on muscle mass) in some children examined indicated the need of closer follow-up in order to
determine the onset of renal disfunction.