function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Delgado, Marlon & Freire, Fúlvio Aurélio de Morais', 4],
    ['Grzelak, Katarzyna & Sørensen, Martin V.', 8],
    ['Jung, Daewui & Lee, Jongrak & Kim, Chang-Bae', 4],
    ['Mariottini, Paolo & Smriglio, Carlo & Oliverio, Marco', 5],
    ['Mehrotra, Rahul & A. Caballer Gutierrez, Manuel & M. Scott, Chad', 3],
    ['Rajendra, S & Nigam, N K & Sivaperuman, C', 1],
    ['Turani, Martina & Carmona, Leila & Barry, Peter J.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=26)',
    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);