function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Cokendolpher, James C. & Enríquez, T.', 1],
    ['De Armas, Luis F.', 4],
    ['De Armas, Luis F. & Agreda, E. O.', 1],
    ['Platnick, Norman I. & Pass, G.', 1],
    ['Teruel, Rolando & De Armas, Luis F.', 1],
    ['Valdez-Mondragón, Alejandro & Cortez-Roldán, Mayra R.', 2],
    ['Valdez-Mondragón, Alejandro & Francke, Oscar F.', 9]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=19)',
    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);