function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Cigliano, María Marta & Pocco, Martina E. & Lange, Carlos E.', 2],
    ['Greco-Spíngola, Silvana & Jorge, Carolina & Lorier, Estrellita', 1],
    ['Hollier, John', 1],
    ['Hollier, John & Heads, Sam W.', 5],
    ['Pocco, Martina E. & Cigliano, María Marta', 1],
    ['Yong, Sheyla & Perez-Gelabert, Daniel E.', 5]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=15)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 6, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);