function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['An, Old Ř Ich Ř Í Č & Kullander, Sven O.', 8],
    ['Bertora, Andrea & Grosman, Fabián & Sanzano, Pablo', 1],
    ['de Brito, Victor & Buckup, Paulo Andreas', 1],
    ['dos Santos, Sergio Alexandre & de Britto, Marcelo Ribeiro', 2],
    ['Říčan, Oldřich & Piálek, Lubomír & Almirón, Adriana', 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);