function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Arun Kumar, T. K.', 2],
    ['Galvão, Vitória Ingrid P. & Koroiva, Ricardo & Wartchow, Felipe', 1],
    ['Karunarathna, Samantha C. & Priyashantha, K Hasith', 3],
    ['Kumar, T. K. Arun', 2],
    ['Regio, Nicolas do Carmo & Palacio, Melissa', 1],
    ['Wijayawardene, Nalin N. & Dissanayake, Lakmali S. & Li, Qi-Rui', 1],
    ['Zambrano-Forero, Cristian J & Davila-Giraldo, Lina R', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=11)',
    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);