title: A common, under-recognized cause of elevated serum erythropoietin.
authors.affiliation: Abramson Cancer Center and Department of Medicine, University of Pennsylvania, Philadelphia.
authors.forename: Daria V
authors.initials: DV
authors.lastname: Babushok
authors.affiliation: William Pepper Laboratories, Hospital of the University of Pennsylvania, Philadelphia.
authors.forename: David
authors.initials: D
authors.lastname: Cardamone
authors.affiliation: William Pepper Laboratories, Hospital of the University of Pennsylvania, Philadelphia.
authors.forename: Nichole
authors.initials: N
authors.lastname: Rulander
authors.affiliation: William Pepper Laboratories, Hospital of the University of Pennsylvania, Philadelphia; Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia.
authors.forename: Stephen R
authors.initials: SR
authors.lastname: Master
authors.affiliation: Abramson Cancer Center and Department of Medicine, University of Pennsylvania, Philadelphia. Electronic address: elizabeth.hexner@uphs.upenn.edu.
authors.forename: Elizabeth O
authors.initials: EO
authors.lastname: Hexner
mesh_terms: D000910:Antibodies, Heterophile; D003951:Diagnostic Errors; D004921:Erythropoietin / Q000097:blood*; D005189:False Positive Reactions; D006801:Humans; D007118:Immunoassay; D008297:Male; D008875:Middle Aged; D011086:Polycythemia / Q000175:diagnosis*
chemical_list: D000910:Antibodies, Heterophile; D004921:Erythropoietin