Corrects sentences into standard English.

Human tumors are heterogeneous and highly dynamic tissues that evolve from benign to malignant status. Although much has been learned over the last several decades about the genetics of tumor initiation and progression, the cellular mechanisms underlying clonal selection and tumor evolution remain poorly under- stood. In many cases cancers evolve by a long-term, stepwise process involving stages of oligoclonality, in which multiple intratumoral cell clones compete in order to expand and invade normal tissue. How intratumoral cell clones interact with each other and with adjacent normal tissue is not well understood. Make sure to only use capital letters in your entire response.
user