C1q Binding Assay Caldesmon by Immunohistochemistry C4D by Immunohistochemistry Calponin by Immunohistochemistry Cadmium Exposure Panel – OSHA Calprotectin, Fecal Cadmium, Blood CALR (Calreticulin) Exon 9 Mutation Analysis by PCR Cadmium, Random Urine Cadmium, Urine Caffeine, Serum or Plasma Calcitonin Calcitonin by Immunohistochemistry Calcium, Ionized, Serum Calcium, Ionized, Whole Blood Calcium, Serum or Plasma C Antigen Typing – Patient Calcium, Urine C1-Esterase Inhibitor Calculi (Stone) Analysis