function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Kment, Petr & Baňař, Petr & Bílý, Svatopluk', 1],
    ['Luo, Jiuyang & Peng, Yanqiong & Xie, Qiang', 2],
    ['Popov, Yuri A.', 2],
    ['Schuh, Randall & Štys, Pavel & Cassis, Gerasimos', 7],
    ['Yin, Jia-Dong & Bu, Wen-Jun & Xie, Qiang', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=14)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 5, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);