function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['DeFilipps, Robert A. & Krupnick, Gary A.', 1],
    ['Gonza ́ Lez-Acun, Daniel A. & Palma, Ricardo L.', 4],
    ['Ilieva, Mihaela', 6],
    ['Info Flora', 1],
    ['Jarvis, Charlie', 2],
    ['Mille, Christian & Henderson, Rosa C. & Cazères, Sylvie', 1],
    ['Ošlejšková, Lucie & Krištofík, Ján & Trnka, Alfréd', 13],
    ['Palma, Ricardo L. & Peck, Stewart B.', 1],
    ['Reeves, Will K. & Durden, Lance A. & Ritzi, Christopher M.', 1],
    ['Reich, Dieter & Gutermann, Walter & Bardy, Katharina', 1],
    ['Sánchez-Montes, Sokani & Colunga-Salas, Pablo', 7],
    ['Valan, Miroslav & Sychra, Oldrich & Literak, Ivan', 5],
    ['Valan, Miroslav & Sychra, Oldřich & Literak, Ivan', 1],
    ['Zhou, Ya-Dong & Mwachala, Geoffrey & Hu, Guang-Wan', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=45)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 14, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);