function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Harbach, Ralph E. & Howard, Theresa M.', 1],
    ['Harbach, Ralph E. & Wilkerson, Richard C.', 2],
    ['Naranjo-Diaz, Nelson & Suaza-Vasco, Juan & Pineda-Angel, Jacobo', 6],
    ['Rivera-García, Karina D. & Mendez-Andrade, Alejandro', 2],
    ['Rozo-Lopez, Paula & Mengual, Ximo', 12]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=23)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 5, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);