Risk of bias
=IF(AND(C3="low risk of bias", D3="low risk of bias", E3="low risk of bias", F3="low risk of bias", G3="low risk of bias"), "low risk of bias", IF(OR(A1="C", B1="C", C1="C"), IF((A1="C")+(B1="C")+(C1="C")>=2, "C", "B"), "B"))
=IF(AND(C3="l