function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['D. MORITZ WAGNER', 1],
    ['Kovařík, František', 10],
    ['Kovařík, František & Šťáhlavský, František', 7],
    ['Leach, William Elford', 1],
    ['Lourenço, Wilson R. & Geniez, Philippe', 1],
    ['Lourenço, Wilson R. & Leguin, Elise-Anne', 1],
    ['Lourenço, Wilson R. & Simon, Eugène', 1],
    ['Pocock, Reginald Innes', 1],
    ['Prendini, Lorenzo & Loria, Stephanie F.', 1],
    ['Rossi, Andrea & Tropea, Gioele', 1],
    ['Rossi, Andrea & Tropea, Gioele & Yağmur, Ersen Aydın', 2],
    ['Sousa, Pedro & Arnedo, Miquel A. & Harris, D. James', 54],
    ['Yagmur, Ersen Aydin & Koc, Halil & Lourenco, Wilson R.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=82)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 13, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);