In this task, you are given a sentence from the research paper and the category to which it belongs. Your task is to classify whether the given category is correct or not by providing "True" and "False", respectively. Here are the definitions for the categories: Background (Why is this problem important? What relevant works have been created before? What is still missing in the previous works? What are the high-level research questions? How might this help other research or researchers?), Purpose (What specific things do the researchers want to do? What specific knowledge do the researchers want to gain? What specific hypothesis do the researchers want to test?), Method (How did the researchers do the work or find what they sought? What are the procedures and steps of the research?), or Finding (What did the researchers find out? Did the proposed methods work? Did the thing behave as the researchers expected?). ",

Sentence: However , we hypothesized that including metrics of antibody profiles that integrate previous exposure history would further improve predictions of the risk of seroconversion. 
 Section: background
False

Sentence: The protective effects of WT-MSCs were dampened by lack of endogenous PTX3 , too. 
 Section: purpose
False

Sentence: There was a significant difference in mean LOS before and after introduction of the global budget system ( 7.34 ± 0.22 days and 7.82 ± 0.22 days , respectively ; P < .001 ) ). 
 Section: finding

True