function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Abdel-Dayem, Mahmoud M & Al Dhafer, Hathal Mohammed', 3],
    ['Collingwood, C. A.', 3],
    ['Else, George R. & Bolton, Barry & Broad, Gavin R.', 6],
    ['Emery, C.', 3],
    ['Fisher, B. L. & Bolton, B.', 3],
    ['Forel, A.', 18],
    ['Jimoh, Bunmi Omowumi & Gomez, Kiko & Kemabonta, Kehinde Abike', 3],
    ['Kiran, Kadri & Karaman, Celal', 5],
    ['Lapeva-Gjonova, Albena & Antonova, Vera', 4],
    ['Mayr, G.', 4],
    ['Paknia, O. & Radchenko, A. & Alipanah, H.', 3],
    ['Roger, J.', 3],
    ['Seifert, Bernhard & Kaufmann, Bernard & Fraysse, Lorenzo', 29],
    ['Smith, F.', 12],
    ['Ward, P. S.', 4],
    ['Other (39)', 55]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=158)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 16, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);