Our parameter of interest, β2, is identified from billing delays; however, one may be concerned our estimator also reflects time-varying responses in utilization relative to the initial medical event. Given that the shoppable service may affect both the focal individual and others in the household...
clip, metallic pellet), when performed, and imaging of the biopsy specimen, when performed, all lesions unilateral or bilateral (for single lesion biopsy, use appropriate code)