<qa>  What is the name of the study that is conducted in 3 medical centers in Asia?This is an open-label, randomized, multicenter phase II study conducting in 3 medical centers in Asia. Patients will receive erlotinib in combination with bevacizumab or erlotinib alone. This study will enroll EGFR-mutant NSCLC patients who have asymptomatic brain metastases. 