sentence: They concluded that among three methods modified phenol-chloroform protocol , simple boiling method and DNA Extraction Mini Kit , both the simple boiling method and the phenol-chloroform method are better methods for DNA isolation from FFPET , besides the phenol-chloroform method is the best method for DNA extraction from buccal cells.1415Cler et al. study for comparison of five extracting DNA methods from paucicellular clinical samples found that the performance of the three commercial kits was superior to either phenol-chloroform extraction or single step proteinase K digestion .