Lee et al., 1994 - Cardiovascular development in the zebrafish. II. Endocardial progenitors are sequestered within the heart field. Development (Cambridge, England)   120:3361-3366 Full text @ Development
Acknowledgments:
This image is the copyrighted work of the attributed author or publisher, and ZFIN has permission only to display this image to its users. Additional permissions should be obtained from the applicable author or publisher of the image. Full text @ Development