function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Copeland, John & Pronzato, Roberto & Manconi, Renata', 3],
    ['Manconi, Renata & Ruengsawang, Nisit & Ledda, Fabio D.', 1],
    ['Nicacio, Gilberto & Pinheiro, Ulisses', 2],
    ['Pinheiro, Ulisses & Calheira, Ludimila & Martins, Celina', 2],
    ['Pronzato, Roberto & Manconi, Renata', 1],
    ['Tavares-Frigo, Maria Da Conceição & Volkmer-Ribeiro, Cecília', 1],
    ['Tavares-Frigo, Maria da Conceição & Volkmer-Ribeiro, Cecília', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=13)',
    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);