Various ribosomal proteins have been already validated for qRT-PCR: RPL13A for the pancreas and the prostate tissues [38], LRP10 for adipose tissue [39], RPL32 for human neutrophils [19] and BAL macrophages from COPD patients, where it was stable irrespective of disease severity [10]. This evidence concerns the gene RPL13A and chronic obstructive pulmonary disease.