function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Carmen, Maria Del', 2],
    ['Castro-Huertas, Valentina & Minghetti, Eugenia', 2],
    ['Forero, Dimitri', 4],
    ['Gil-Santana, Hélcio R.', 7],
    ['Gil-Santana, Hélcio R. & Baena, Manuel', 4],
    ['Gil-Santana, Hélcio R. & Baena, Manuel & Grillo, Horacio', 3],
    ['Gil-Santana, Hélcio R. & Carpintero, Diego L.', 1],
    ['Gil-Santana, Hélcio R. & Oliveira, Jader & Bérenger, Jean-Michel', 3],
    ['Kirkaldy, George Willis', 1],
    ['María C. Melo & Gimena Dellapé & Leonela Olivera', 6]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=33)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 10, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);