https://stmcg.r-universe.dev/smoothedIPWhttps://stmcg.r-universe.dev/api/packages/smoothedIPWhttps://stmcg.r-universe.dev/smoothedIPW/smoothedIPW.pdfhttps://stmcg.r-universe.dev/smoothedIPW/doc/manual.htmlhttps://stmcg.r-universe.dev/smoothedIPW/NEWShttps://stmcg.r-universe.dev/smoothedIPW/NEWS.txthttps://stmcg.r-universe.dev/smoothedIPW/citationhttps://stmcg.r-universe.dev/smoothedIPW/citation.txthttps://stmcg.r-universe.dev/smoothedIPW/citation.cff