| http://www.w3.org/ns/prov#value | - Along with factors including age, gender, clinicalstage, serum lactate dehydrogenase (LDH) level, performancestatus, bulky mass, B symptoms, revised International Prognos-tic Index (R-IPI) and number of extranodal involvement sites,the presence or absence of the following 26 extranodal involve-ment sites was recorded: orbita, nasal sinus, paranasal sinus,Waldeyer???s ring, salivary gland, thyroid
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