function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Botero-Trujillo, Ricardo & Erazo-Moreno, Martha C.', 2],
    ['Kovařík, František & Teruel, Rolando', 3],
    ['Moreno-González, Jairo A. & Bertani, Rogério', 2],
    ['Teruel, Rolando', 1],
    ['Teruel, Rolando & Rivera, Mel J. & Sánchez, Alejandro J.', 2],
    ['de Armas, Luis F.', 5]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=15)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 6, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);