[PubMed] 79 million people worldwide by 2020 [PubMed] [PubMed] [PubMed] [PubMed] [PubMed] 76 million [PubMed] [PubMed] [PubMed] [PubMed] [PubMed] [PubMed] PubMed [PubMed] [PubMed] [PubMed] [PubMed] [PubMed] [PubMed] [PubMed] [PubMed] [PubMed] [PubMed] [PubMed] [PubMed] [PubMed] [PubMed] PubMed PubMed [PubMed] [PubMed] [PubMed] [PubMed] [PubMed] [PubMed] [PubMed] [PubMed] [PubMed] [PubMed] [PubMed] [PubMed] [PubMed] [PubMed] [PubMed] PubMed/NCBI [PubMed] [PubMed] [PubMed] [PubMed] [PubMed] [PubMed] [PubMed] [PubMed] [PubMed] [PubMed] [PubMed] [PubMed] [PubMed] [PubMed] [PubMed]