function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Gkelis, Spyros & Ourailidis, Iordanis & Panou, Manthos', 8],
    ['González-Resendiz, Laura & León-Tejera, Hilda P.', 1],
    ['Gupta, Pratibha', 1],
    ['Luz, Ruben & Cordeiro, Rita & Fonseca, Amelia', 3],
    ['Novis, Phil M. & Visnovsky, Gabriel', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=14)',
    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);