“…In the 2016 ASCO Resource-Stratified Clinical Practice Guideline, recommendations were made on alternative best treatment options for clinicians practicing in these settings (Chuang et al, 2016). The Guideline was developed based on review of existing guidelines or expert consensus opinions when evidence was not available (Colombo et al, 2012, Ebina et al, 2015, Hirte et al, 2015, Koh et al, 2015). A four-tier approach (basic, limited, enhanced, and maximal) was developed based on recommendations by the Breast Health Global Initiative (Anderson & Distelhorst, 2008).…”