Dose escalation and expansion cohorts in patients with advanced breast cancer in a Phase I study of the CDK7-inhibitor samuraciclib av Coombes, RC, Howell, S, Lord, SR, Kenny, L, Mansi, J, Mitri, Z, Palmieri, C, Chap, LI, Richards, P, Gradishar, W, Sardesai, S, Melear, J, O’Shaughnessy, J, Ward, P, Chalasani, P, Arkenau, T, Baird, RD, Jeselsohn, R, Ali, S, Clack, G, Bahl, A, McIntosh, S, Krebs, MG