function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bastian, Henry Charleton', 1],
    ['Brakenhoff., Von H.', 1],
    ['Brzeski, M.', 1],
    ['Gagarin, Vladimir G. & Naumova, Tatyana V.', 1],
    ['Holovachov, Oleksandr', 14],
    ['Khudhir, Manda & Hodda, Mike & Nicholas, Evelyn', 1],
    ['P. A. A. LOOF', 1],
    ['Von W. Schneider', 1],
    ['Wilhelm Schneider', 2],
    ['Xu, Yu Mei & Zhao, Zeng Qi & Davies, Kerrie A. & Wang, Jian Ming', 1],
    ['Zhao, Zeng Qi', 3],
    ['Zhao, Zeng Qi & Xu, Yu Mei', 3],
    ['Zullini, A.', 1],
    ['Zullini, Aldo', 1],
    ['Árpád, Soós', 6]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=38)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 15, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);