function drawChartTreatmentsPerSource() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Annals and Magazine of Natural History, Including Zoology, Botany and Geology, Being a Continuation of the \' Magazine of Botany ', 1],
    ['Annals of the Natal Museum', 1],
    ['Dipteron', 3],
    ['F. W. Forstmann', 14],
    ['Longmans, Green & Co', 1],
    ['Magazin fu ̈ r insektenkunde / herausgegeben von Karl Illiger', 1],
    ['Programm Kaiserliche Realschule zu Meseritz:', 1],
    ['ProgrammKaiserlicheRealschule zu Meseritz', 1],
    ['Zoologisches Magazin (Wiedemann)', 1],
    ['Zoosystema', 1],
    ['Zootaxa', 48],
    ['Öfversigt af Konglelige Vetenskaps-Akademiens Förhandlingar', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Journal (n=74)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerSource', 'pie', 12, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerSource'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerSource);