function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Amorim, Dalton De Souza & Oliveira, Sarah Siqueira', 1],
    ['Fitzgerald, Scott J.', 6],
    ['Fitzgerald, Scott J. & Kerr, Peter H.', 10],
    ['Jakovlev, Jevgeni & Salmela, Jukka & Polevoi, Alexei', 2],
    ['Kolcsár, Levente-Péter & Salmela, Jukka', 1],
    ['Kurina, Olavi', 1],
    ['Oliveira, Sarah Siqueira & Amorim, Dalton De Souza', 9],
    ['Zaitzev, Alexander', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=31)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 8, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);