Antibiotics, Antineoplastic/pharmacology; Breast Neoplasms/drug therapy; Breast Neoplasms/pathology; Doxorubicin/pharmacology; Drug Resistance, Multiple/genetics; Drug Resistance, Neoplasm/genetics; Neoplastic Stem Cells/metabolism; AC133 Antigen; ATP Binding Cassette Transporter, Subfamily B; ATP Binding Cassette Transporter, Subfamily B, Member 1/genetics; Animals; Antigens, CD/metabolism; CD24 Antigen/metabolism; Cell Line, Tumor; Cell Movement; Cell Proliferation; Cell Survival; Collagen; Confounding Factors, Epidemiologic; Disease Models, Animal; Drug Combinations; Female; Flow Cytometry; Gene Expression Regulation, Neoplastic; Glycoproteins/metabolism; Humans; Hyaluronan Receptors/metabolism; Laminin; Lung Neoplasms/drug therapy; Mice; Mice, SCID; Microarray Analysis; Neoplastic Stem Cells/immunology; Neoplastic Stem Cells/pathology; Ovarian Neoplasms/drug therapy; Peptides/metabolism; Proteoglycans; RNA, Messenger/metabolism; Reverse Transcriptase Polymerase Chain Reaction; Transplantation, Heterologous; Up-Regulation; Uterine Cervical Neoplasms/drug therapy