Financial support for this study was provided by Seagen Inc. and Astellas Pharma. Z Hepp and S-Y Liang are employees of Seagen Inc. and own stock/stock options in Seagen Inc. SN Shah was a contractor for Astellas Pharma at the time of the study. K Tan and S Balakrishna are employees of Flatiron Health, Inc.; Flatiron Health, Inc. received consulting fees from Seagen Inc. The authors have no other relevant affiliations or financial involvement with any organization or entity with a financial interest in or financial conflict with the subject matter or materials discussed in the manuscript apart from those disclosed.

Medical writing support was provided by Jonathon Carthy of Curo, a division of Envision Pharma Group, and funded by Seagen Inc.