This protocol details the procedure of methods for Clinical Chart Abstraction: Real-World ALK Inhibitor Treatment Patterns and Reasons for Discontinuation Study performed at the University of California, San Francisco. The protocol defines each variable in detail ranging from demographics, disease characteristics, prior treatments, ALK inhibitor treatment, regimen adjustment and interruptions, ancillary treatments, treatment discontinuation, next treatment, serious adverse events, and other notable variables. These definitions can be used and applied when performing a manual chart abstraction looking at treatment patterns for a given medication(s). They can also be applied to more general manual chart abstractions seeking to characterize demographics and disease characteristics.