AUTHORS CONTRIBUTION
Enrique Grande, Philippe Pultar, Xinhui Chen and Giuseppe Curigliano contributed to patient accrual, data analysis, data interpretation, writing and critical revision of the manuscript. Xiaoming Cui, Monica Giovannini and Eddie Marriere contributed to designing the study, patient accrual, data analysis, data interpretation, writing and critical revision of the manuscript. Michelle Quinlan contributed to writing and critical revision of the manuscript. All authors have read and approved the final version of this manuscript.