https://anders-biostat.r-universe.dev/jrchttps://anders-biostat.r-universe.dev/api/packages/jrchttps://anders-biostat.r-universe.dev/jrc/jrc.pdfhttps://anders-biostat.r-universe.dev/jrc/doc/manual.htmlhttps://anders-biostat.r-universe.dev/jrc/NEWShttps://anders-biostat.r-universe.dev/jrc/NEWS.txthttps://anders-biostat.r-universe.dev/jrc/citationhttps://anders-biostat.r-universe.dev/jrc/citation.txthttps://anders-biostat.r-universe.dev/jrc/citation.cff