Tentei criar algum módulo principal para, como no tutorial, exceto um detalhe, quero fornecer apenas serviços. Portanto, meu CoreModule deve ser como - provedor de serviços singleton, porque eu não quero fornecer muitos serviços no AppModule como nas versões do aplicativo <= RC4. Eu tentei fazer essas coisas, mas não está funcionando. Eu cometi algum erro? Obrigado por qualquer ajuda.

import {
  ModuleWithProviders, NgModule,
  Optional, SkipSelf }       from '@angular/core';

import { CommonModule }      from '@angular/common';

import { CommunicatePatientListService }    from './services/communicate_patients_list.service';
import { HTTPPatientsListService }    from './services/http_patients_list.service';
import { SharedService }    from './services/shared_service';


@NgModule({
  imports:      [ CommonModule ],
  providers:    [
    CommunicatePatientListService,
    HTTPPatientsListService,
    SharedService
  ],
  exports: []
})
export class CoreModule {}

Atualização 2. Tentei maneiras diferentes de fazer as coisas que me foram fornecidas e encontrei um momento interessante.

Quando importo nos serviços singleton COREModule via importação padrão, ele não funciona, mas quando importei por aliases System.js, ele está funcionando agora. Estou realmente me perguntando como isso funciona. Aqui está o código

CoreModule:
import {
  ModuleWithProviders, NgModule,
  Optional, SkipSelf }       from '@angular/core';

import { CommonModule }      from '@angular/common';


import { HeaderModule } from './modules/header/header.module';
import { FooterComponent } from './modules/footer/footer.component';


//THAT DOESNT WORK
// import { CommunicatePatientListService }    from './services/communicate_patients_list.service';
// import { HTTPPatientsListService }    from './services/http_patients_list.service';
// import { SharedService }    from './services/shared_service';
// import { SchedulerSharedService }    from './services/scheduler_shared.service';
// import { FormChangeService }    from './services/on_form_change.service';

//IT IS WORKING NOW
import { CommunicatePatientListService } from '%sharedServices%/communicate_patients_list.service';
import { HTTPPatientsListService } from 'httpPatientsListService';
import { SharedService } from 'sharedService';
import { SchedulerSharedService } from 'schedulerSharedService';
import { FormChangeService } from 'formChangeService';



@NgModule({
  imports:      [
    CommonModule,
    HeaderModule,
  ],
  declarations: [
    FooterComponent
  ],

  exports: [
    FooterComponent,
    HeaderModule
  ]
})
export class CoreModule {

  constructor (@Optional() @SkipSelf() parentModule: CoreModule) {
    if (parentModule) {
      throw new Error(
        'CoreModule is already loaded. Import it in the AppModule only');
    }
  }

  static forRoot(): ModuleWithProviders {
    return {
      ngModule : CoreModule,
      providers:    [
        CommunicatePatientListService,
        HTTPPatientsListService,
        SharedService,
        FormChangeService,
        SchedulerSharedService
      ]
    };
  }


}

Componente Lista de pacientes

import { Component, Input, OnInit, ViewChild } from '@angular/core';

import { CommunicatePatientListService } from '%sharedServices%/communicate_patients_list.service';
    import { HTTPPatientsListService } from 'httpPatientsListService';
    import { SharedService } from 'sharedService';
    import { SchedulerSharedService } from 'schedulerSharedService';
    import { FormChangeService } from 'formChangeService';

    import { Config } from 'appConfig';
    /* ------- !Config  ---------*/

    const MODULE_NAME: string = 'patients_list';
    const MODULE_PATH: string = `${Config.getProdFolderName()}/modules/patients/${MODULE_NAME}`;


    @Component({
      templateUrl: `${MODULE_PATH}/${MODULE_NAME}.component.html`,
      styleUrls: [`${MODULE_PATH}/${MODULE_NAME}.component.css`,]
    })


    export class PatientsListComponent implements OnInit {
      constructor(
        private patientsListService:HTTPPatientsListService,
        private patsListServCom:CommunicatePatientListService,
        private schedulerSharedService:SchedulerSharedService,
        private sharedService:SharedService
      ) {
  }