function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Jablonski, Daniel & Regan, John M. & Holzheuser, Chace', 1],
    ['Jiří Šmíd & Jiří Moravec & Václav Gvoždík & Jan Štundl', 9],
    ['Razzetti, Edoardo & Sindaco, Roberto & Grieco, Cristina', 2],
    ['Sindaco, Roberto & Simó-Riudalbas, Marc & Sacchi, Roberto', 2],
    ['Šmíd, Jiří & Moravec, Jiří & Kodym, Petr & Kratochvíl, Lukáš', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=17)',
    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);