text: Yo, check it out, I got a scientific tale to tell,
  'Bout a microcolony assay, puttin' radiation through its paces, oh hell!
  We're talkin' murine intestinal crypts, clonogens in sight,
  Different doses of irradiation, shinin' bright.
  
  In this experiment, we compared two-dose methodologies,
  One and two fractions, keepin' it steady, no apologies.
  Also, multiple-dose methods, crypt survival curves in play,
  Equal doses per fraction, seein' how they sway.
  
  With two doses, we estimated clonogen numbers,
  Low doses had 3 to 4, not many encumbers.
  But at high biological doses, the count soared,
  40 clonogens, we couldn't ignore.
  
  Multifraction methods revealed a different view,
  From 13 to 26 and 22, the numbers grew.
  After three and four fractions, they did rise,
  But when we excluded high doses, it was a surprise.
  
  The values dropped to 11 and 9, no doubt,
  Fraction numbers ain't makin' much clonogen clout.
  So, we conclude that the high numbers seen,
  In multiple-dose protocols, ain't as it seems.
  
  It's the biological doses that play their part,
  Givin' those high values, messin' with our chart.
  Compared to two-dose protocols, lower but dose-dependent,
  The explanation lies in doses, biologically ascendant.