Scientists and doctors must find a way, either physically or chemically, for mechanical devices to find the Epidermal Growth Factor (EGF) receptors so that the CSD can bind onto the cancer cell through the EGF receptors.
The ODC-level processors must be able to actually measure the ODC enzyme activity levels of a cancer cell so that it is able to compare the level to the enzyme activity level of a healthy cell.
There must be a simple and practical way of creating the assembler that Eric Drexler had proposed of. Yet, scientists are faced with the chicken and egg problem; an assembler is needed in order to create another assembler.
EGF Receptors