One can find single-stage and two-stage designs for a phase II single-arm study with either efficacy or safety/toxicity endpoints as described in Kim and Wong (2019) <doi:10.29220/CSAM.2019.26.2.163>.
https://anaconda.org/r/r-gen2stage/badges/version.svg
https://anaconda.org/r/r-gen2stage/badges/latest_release_date.svg
https://anaconda.org/r/r-gen2stage/badges/latest_release_relative_date.svg
https://anaconda.org/r/r-gen2stage/badges/platforms.svg
https://anaconda.org/r/r-gen2stage/badges/license.svg
https://anaconda.org/r/r-gen2stage/badges/downloads.svg