Many groups have used CD34, CD133, and VEGFR2 surface markers in various combinations and successfully identified inverse correlations to disease states; however, recent reports have challenged the origin of cells with these markers and provide evidence that some of these cell populations, initially described as EPCs, are in fact myeloid-derived hematopoetic precursors [ 31].
A Himalayan yeti named Migo (voiced by Channing Tatum) challenges the origin story of his isolated village high above the clouds.
In 2009, two Bosnian citizens of Roma and of Jewish origin challenged the Dayton constitution at the European court of human rights and won.
On the same day, Nagib Assef, an Australian Greco-Roman wrestling champion of Turkish origin, challenged Maeda.
Although traditionally included in the Entognatha [ 21], recent studies and the re-interpretation of morphological characters have challenged the common origin of entognathy observed in living Collembola, Protura and Diplura [ 22, 24, 25, 52, 53].
In papers filed in a New York court, Dymtrow challenged Swift's origins story: "How does an eighteen-year-old singer from a small town in Pennsylvania make it to the cover of Rolling Stone's 'Best of Rock 2008'?
Though counterfeit fentanyl has created an unfathomable problem that both law enforcement, government, and medical professionals are being challenged by, the origins of of the opioid overdose crisis can be traced back to overprescribing of opioids by doctors, which inevitably inflicted some people with opioid addiction.
Though counterfeit fentanyl has created an unfathomable problem that law enforcement, the government, and medical professionals are being challenged by, the origins of of the opioid overdose crisis can be traced back to overprescribing of opioids by doctors, which inevitably inflicted some people with opioid addiction.
Though counterfeit fentanyl has created an unfathomable problem that law enforcement, government, and medical professionals are being challenged by, the origins of of the opioid overdose crisis can be traced back to overprescribing of opioids by doctors, which inevitably inflicted some people with opioid addiction.
Aquilegia petals have been suggested to be derived from sterilized stamens [26] whereas an andropetaloid origin for Arabidopsis petals has recently been challenged and an bracteopetaloid origin has been suggested instead [27].
The monophyletic origin was challenged earlier on by others, who also proposed an alternative evolutionary model (Bodyl 2005; Bodyl et al. 2009).
