No_intervention: Botulinum Toxin Injection and Conventional Therapy

The group received conventional therapy (such as stretching exercises) after Botulinum Toxin Type A Injection for spastic lower extremity muscle groups.

Active_comparator: Botulinum Toxin Injection and Shockwave Therapy

The group received extracorporeal shockwave therapy conventional therapy (such as stretching exercises). Shockwave therapy is planned 3 sessions, starting first week after injection. It is planned to apply 1500 pulses, 4 hertz, 2 bars radial eswt to the injected spastic muscle groups in each session. The patients in this group will continue to their conventional therapy like the first group.