Links to different Nephrology-related sites
Kidney International
PubMed (National Library of Medicine)
New England Journal of Medicine
Hypertension, Dialysis and Clinical Nephrology

Links to nephrology associations and others
International Society of Nephrology

Links to different Oncology-related sites
The Oncologist
Blood Online

Links to oncology associations and others
ASCO
JCO
NCCN
Hematology