function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Blinn, Robert L.', 1],
    ['Castro-Huertas, Valentina & Forero, Dimitri', 7],
    ['Gil-Santana, Hélcio R.', 4],
    ['Gil-Santana, Hélcio R. & Pinto, Fernando B. & Zeraik, Soraya O.', 4],
    ['Melo, María Cecilia', 5],
    ['Melo, María Cecilia & Coscarón, María Del Carmen', 1],
    ['Montemayor, Sara Itzel & Dellapé, Pablo Matías', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=23)',
    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);