In this task, you will be given a sentence. You need to reconize the name of the disorder or disease. Disease is a disorder of structure or function in a human, animal, or plant, especially one that produces specific symptoms or that affects a specific location and is not simply a direct result of physical injury. Although there might be several correct answers, you need to write one of them.

Example input: I had been suffering from cardiovascular disorder.
Example output: cardiovascular disorder
Example explanation: Here, the person mentions this disorder which is related to heart issues.
Q:  The seven exons , the exon / intron boundaries and part of 3 noncoding sequence of the CPO gene were systematically analyzed by an exon - by - exon denaturing gradient gel electrophoresis ( DGGE ) strategy followed by direct sequencing in seven unrelated heterozygous HC patients from France , Holland , and Czech Republic .
A:
HC