Fusion protein of human choriogonadotropin subunit beta (CG-beta)-(118-145)-peptide (1-28) with human somatotropin (growth hormone, GH) (29-219) and two tandem copies of human choriogonadotropin subunit beta (CG-beta)-(118-145)-peptide (220-247, 248-275), O-glycosylated on 12-18 serines, produced in CHO cells