Repeat Contrast Medium Reactions in Premedicated Patients: Frequency and Severity
contrasts can be applied to only factor in R - Stack Overflow
Effect of Luminaire Arrangement on Object Visibility
Factor level Error in `contrasts<-`(`*tmp*`, value = contr.funs[1 + isOF[nn]]) : contrasts can be applied only to factors with 2 or more levels - Stack Overflow
Full text] Thoracic Imaging at Exacerbation of Chronic Obstructive Pulmonary Dise | COPD
ggeffect for MCMCglmm · Issue #130 · strengejacke/ggeffects · GitHub