Given an abstract of a paper, generate a title for this paper such that conveys the key focus of the paper.

Q: Abstract: A variety of effective drugs are available for the treatment of schizophrenia. Knowledge of the side-effect spectrum of the various classes of antipsychotic drugs is necessary for the clinician to arrive at a rational choice of medication. In general, the preferred drug will be a high-potency neuroleptic. The following basic principles of clinical psychopharmacology should be followed: Consider risk and benefits; clinical experience is prerequisite; establish the diagnosis; select the appropriate class of psychotropic drug for the primary diagnosis; within drug class, the drugs are usually equally effective for patients with the diagnosis; give a dose that is high enough to be effective; choose target symptoms that can be monitored to indicate when to stop or increase the drug; avoid use of multiple drugs when possible; drugs are only one element in a comprehensive treatment strategy. Other modalities need equally careful consideration, e.g., psychotherapy, group therapy, family treatment, and vocational rehabilitation; and consultation with other subspecialists should be sought readily when indicated.

A: Schizophrenia and antipsychotic drugs.
****
Q: Abstract: Injection of homologous DNA sequences into nuclei of cultured mammalian cells induces mutations in the cognate chromosomal gene. It appears that these mutations result from incorrect repair of a heteroduplex formed between the introduced and the chromosomal sequence. This phenomenon is termed 'heteroduplex induced mutagenesis'. The high frequency of these events suggests that this method may prove useful for introducing mutations into specific mammalian genes.

A: Introduction of homologous DNA sequences into mammalian cells induces mutations in the cognate gene.
****
Q: Abstract: A case of craniopagus twins joined in the temporoparietal area is presented, along with a review of the literature on craniopagus. A large area of brain was shared between the neurologically normal infants, with defects in the scalp, skull, and dura. The twins were separated in a three-step procedure. First, areas of shared brain were divided and separated with silicone sheets. The second procedure consisted of the insertion of scalp expanders to allow primary skin closure. In the third procedure complete separation was performed which was complicated by severe hypotension in one infant that was due to dural sinus hemorrhage. Cerebrospinal fluid leak was the most difficult problem encountered in the postoperative period; this was treated with lumboperitoneal and ventriculoperitoneal shunts. After 2 years, one twin is neurologically normal; the other is severely developmentally delayed, possibly related to the severe hypotension experienced during the third procedure. A review of the literature on craniopagus is presented. Analysis of data in the literature suggests that the area involved in the craniopagus as well as the venous connections are closely related to survival following separation of craniopagus twins.

A:
Temporoparietal craniopagus. Case report and review of the literature.
****