function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Carmen, Maria Del', 4],
    ['Carpintero, Diego Leonardo & Dellapé, Pablo Matías', 4],
    ['Castro-Huertas, Valentina & Minghetti, Eugenia', 3],
    ['Ferreira, Marina Izabel Grave & Ferreira, Rodrigo Lopes', 3],
    ['Gil-Santana, Hélcio R.', 1],
    ['María C. Melo & Gimena Dellapé & Leonela Olivera', 6],
    ['Melo, Maria Cecilia & Dellape, Pablo Matias', 2],
    ['Melo, María Cecilia', 1],
    ['Oliveira, Jader & Alevi, Kaio Cesar Chaboli', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=25)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 9, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);