function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Chavarría, Laura & Hanson, Paul & Marsh, Paul & Shaw, Scott', 1],
    ['Gutierrez-Arellano, Daniela & Gutierrez-Arellano, Claudia Renata', 12],
    ['Joele, Flavia R. & Zaldivar-Riveron, Alejandro', 6],
    ['Joele, Flávia R. & Rezende, Uiara C. & Samacá-Sáenz, Ernesto', 1],
    ['Martinez, Juan J. & Zaldivar-Riverón, Alejandro', 3],
    ['Oliveira, Tamires Camila Talamonte De & Sáenz, Ernesto Samacá', 2],
    ['Samacá-Sáenz, Ernesto & Egan, Scott P.', 5]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=30)',
    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);