PCR products were purified with the microcon columns (Millipore, Zug, Switzerland) before sequencing. Each PCR product was sequenced at least twice. Nucleotide changes were confirmed by a second PCR and sequencing. Chromatograms produced with the ABI Prism 3130XL DNA Sequencer (Applied Biosystems, PE Europe BV, Basel, Switzerland) were directly imported for proofreading with the Geneious Pro 5.0.3 software (Biomatters Ltd., Auckland, New Zealand). All sequences are available at GenBank under accession numbers HM347236-727; JF285163-176; JF285179; JF285186; JF285192,193,195,197,198, 200,204,206-8,210 ,213-214,224-225, JF285228-307.