function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bezděk, Aleš & Boucher, Stéphane & Hájek, Jiří', 2],
    ['Boucher, Stéphane & Ramírez, Rolando', 1],
    ['Boucher, Stéphane & Salazar, Karen', 6],
    ['Cano, Enio B.', 1],
    ['Fonseca, Cláudio Ruy Vasconcelos Da & Reyes-Castillo, Pedro', 13],
    ['Jimenez-Ferbans, Larry & Maestre-Guerra, Ana', 4],
    ['Jiménez-Ferbans, Larry & Reyes-Castillo, Pedro', 1],
    ['Salazar-Niño, Karen & Serrão, José Eduardo', 9]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=37)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 8, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);