. 2002 May 28;2:4. doi: 10.1186/1471-2393-2-4
Copyright © 2002 Hromadnikova et al; licensee BioMed Central Ltd. This is an Open Access article: verbatim copying and redistribution of this article are permitted in all media for any purpose, provided this notice is preserved along with the article's original URL.
Figure 3.
Levels of fetal DNA in maternal plasma.