All of the following are components of Light's criteria for pleural effusion except:
Effusion protein/serum protein ratio greater than 0.5 Effusion lactate dehydrogenase (LDH)/serum LDH ratio greater than 0.6 Effusion LDH level greater than two-thirds the upper limit of the laboratory's reference range of serum LDH Effusion sugar is less than 2/3rd of blood sugar