function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Dale-Skey, Natalie & Askew, Richard R. & Noyes, John S.', 6],
    ['Kissayi, Khadija & Benhalima, Souâd & Mitroiu, Mircea-Dan', 1],
    ['László, Zoltán & Kelemen, Tünde-Ilona & Japoshvili, George', 1],
    ['Madl, Michael', 1],
    ['Plecas, Milan & Zikic, Vladimir & Kocic, Korana', 1],
    ['Tselikh, E. V.', 1],
    ['Tselikh, E. V. & Lee, J. & Ku, D-S.', 1],
    ['Walker, Francis', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=14)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 8, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);