STK11 and head and neck squamous cell carcinoma: This mutual exclusivity of LKB1 or NUAK1 alterations is observed other tumor types including head and neck squamous cells carcinomas (19.7% of data set from 295 tumors), (95% Confidence Interval: 0.552751–5.723118 P-value: 0.250381 (Fisher's Exact Test), cervical squamous cell carcinoma (30.6% of data set from 36 tumors), (95% Confidence Interval: 0.095179–10.506562 P-value: 0.695155 (Fisher's Exact Test) and lung squamous cell carcinoma (15.3% of data set from 177 tumors), (95% Confidence Interval: 0.109684–7.534791 P-value: 0.703561 (Fisher's Exact Test).