Visit 1 Visit 2 Visit 3 Visit 4
  Baseline 4 weeks 8 weeks 12 weeks
Informed consent form •      
Medical history taking •      
Physical examination • • • •
Measurement of body weight • • • •
Serological assays • • • •
Abdominal echography • • • •
Evaluation of VAS • • • •
Table 2: Study schedule at each visit.