function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bastos, Cláudia A. & Berg, Cássio Van Den', 1],
    ['Jarvis, Charlie', 1],
    ['Leopardi, Carlos & Carnevali, Germán', 1],
    ['Leopardi-Verde, Carlos L. & Carnevali, German', 1],
    ['Leopardi-Verde, Carlos L. & Reina-Rodríguez, Guillermo A.', 3],
    ['León-Peralta, Cekouat E. & Salmerón-Barrera, Edgar', 1],
    ['Vega, Hermes & Cetzal-Ix, William & Mó, Edgar', 14]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=22)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 7, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);