loop_
_sas_sample_entities.id
_sas_sample_entities.sample_id
_sas_sample_entities.entity_id
_sas_sample_entities.concentration
1 1 BSA 1.2
2 1 LYZ 0.7
3 2 BSA 3.3
3 2 HGF .
3 2 EPO 0.1