passages.id: split_7_validation_1674_passage
passages.type: progene_text
passages.text: Two days after a single injection of PG G-CSF , the frequency of colony - forming unit - culture ( CFU-c ) in the spleen was increased 289 - fold compared with an 8 - fold increase after 2 days of twice - daily injections of saline - formulated G-CSF .