Adult 1 Chromogranins 1 DNA Methylation 1 DNA methylation 1 Diseases in Twins 1 Female 1 GNAS 1 GNAS protein, human 1 GTP-Binding Protein alpha Subunits, Gs 1 Genomic Imprinting 1 Heterodisomy 1 Humans 1 Hypocalcemia 1 Imprinting disorder Monozygotic twins 1 Pedigree 1 Pseudohypoparathyroidism 1 Sporadic pseudohypoparathyroidism 1B 1 Twins, Monozygotic 1 Whole Genome Sequencing 1 adult 1 case report 1 chromogranin 1 drug effect 1 female 1 genetics 1 genome imprinting 1 human 1 monozygotic twins 1 pedigree 1