function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Arzanov, Yu. G. & Martynov, V. V. & Nikulina, T. V.', 3],
    ['Germar, Ernst Friedrich', 1],
    ['Graf, Roman & Szallies, Alexander', 1],
    ['Lu, Xiuxia & Zhang, Runzhi & Langor, David W.', 2],
    ['Mitter, Heinz', 1],
    ['Pérez-Hernández, Cisteil Xinum', 1],
    ['Williams, Daryl J. & Langor, David W.', 2],
    ['Yunakov, Nikolai & Nazarenko, Vitalij & Filimonov, Rostislav', 8]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=19)',
    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);