function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Gagarin, Vladimir G. & Gusakov, Vladimir A.', 5],
    ['Gagarin, Vladimir G. & Naumova, Tatyana V.', 5],
    ['Girgan, Chantelle & Marais, Mariette & Fourie, Hendrika', 2],
    ['Gusakov, Vladimir A. & Gagarin, Vladimir G.', 1],
    ['Holovachov, Oleksandr', 52],
    ['Khudhir, Manda & Hodda, Mike & Nicholas, Evelyn', 3],
    ['Naumova, Tatyana V. & Gagarin, Vladimir G.', 4],
    ['Tsalolikhin, S. Ya.', 1],
    ['Wilhelm Schneider', 1],
    ['Zullini, A.', 1],
    ['Árpád, Soós', 11]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=86)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 11, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);