Sample	Group1	Group2
CK1	CK	CKa
CK2	CK	CKa
CK3	CK	CKa
CK4	CK	CKb
CK5	CK	CKb
CA1	CA	CAa
CA2	CA	CAa
CA3	CA	CAa
CA4	CA	CAb
CA5	CA	CAb